To my knowledge the properties of concrete are not life-enhancing

IT comes as no surprise at all that much of Bristol exceeds (‘Pollution: 269 schools are in areas where air quality exceeds safe limit,’ June 18) the World Health Organisation limits for air pollution.

Indeed, your report confirmed that nearly 270 school environs within the BS postcodes were in excess of recommended limits. This is perfectly understandable, for I suspect that a large proportion of parents ferry their children to schools in petrol-polluting cars.

Furthermore, perhaps Bristol City Council could add environmentally to their already impressive banning of cars from Bristol Bridge/Baldwin Street.

Namely, there is a golden (or green!) opportunity adjacent to Bristol Bridge identified in your report: ‘Castle Park Vision to breathe new life into St Mary le Port eyesore site’ (June 17) where we were told that existing derelict buildings would be demolished. There would then be: “Three new office buildings... with independent retailers, cafes, restaurants, and bars at ground level.”

I find it amazing that Bristol City Council should want to add to an inner-city already super-saturated with offices/bars/gyms etc!

If Bristol City Council really are committed to improving the city’s air quality it could, instead of adding to the city’s concrete jungle, scatter the new vacant spaces with grass seed!

They might like to note that the process of photosynthesis means that 25 square feet of grass produces enough oxygen each day to meet the needs of one adult.

To my knowledge concrete does not have such life-enhancing properties!

So come on Bristol City Council – really show your green potentials by turning this small corner of Castle Park greener.

R L Smith Knowle